The destruction of the PAC very easily. If they don’t keep 6 original schools the conference folds. The remnants could merge with the MWC and a few more schools to form another 16 team conference. Then the AAC, Sunbelt and MAC doing some kind of merger to get down to just 6-8 conferences. It could be that every conference’s champion gets into the CFP and the remaining P4 will get byes. The cap it so no other schools can move to FBS.
If something doesn’t happen eventually the P3 after the ACC get blown up